﻿// This file is part of YamlDotNet - A .NET library for YAML.
// Copyright (c) Antoine Aubry and contributors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
// of the Software, and to permit persons to whom the Software is furnished to do
// so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// SOFTWARE.

using System;
using System.Collections.Generic;
using System.Linq;

namespace YamlDotNet.Serialization.ObjectGraphTraversalStrategies
{
    /// <summary>
    /// An implementation of <see cref="IObjectGraphTraversalStrategy"/> that traverses
    /// properties that are read/write, collections and dictionaries, while ensuring that
    /// the graph can be regenerated from the resulting document.
    /// </summary>
    public class RoundtripObjectGraphTraversalStrategy : FullObjectGraphTraversalStrategy
    {
        private readonly IEnumerable<IYamlTypeConverter> converters;
        private readonly Settings settings;

        public RoundtripObjectGraphTraversalStrategy(IEnumerable<IYamlTypeConverter> converters, ITypeInspector typeDescriptor, ITypeResolver typeResolver, int maxRecursion, INamingConvention namingConvention)
            : this(converters, typeDescriptor, typeResolver, maxRecursion, namingConvention, new Settings())
        {
        }

        public RoundtripObjectGraphTraversalStrategy(IEnumerable<IYamlTypeConverter> converters, ITypeInspector typeDescriptor, ITypeResolver typeResolver, int maxRecursion, INamingConvention namingConvention, Settings settings)
            : base(typeDescriptor, typeResolver, maxRecursion, namingConvention)
        {
            this.converters = converters;
            this.settings = settings;
        }

        protected override void TraverseProperties<TContext>(IObjectDescriptor value, IObjectGraphVisitor<TContext> visitor, TContext context, Stack<ObjectPathSegment> path)
        {
            if (!value.Type.HasDefaultConstructor(settings.AllowPrivateConstructors) && !converters.Any(c => c.Accepts(value.Type)))
            {
                throw new InvalidOperationException($"Type '{value.Type}' cannot be deserialized because it does not have a default constructor or a type converter.");
            }

            base.TraverseProperties(value, visitor, context, path);
        }
    }
}
